https://github.com/elasticrash/tougo-query-builder
query builder for postgres A little library for constructing raw sql queries.
https://github.com/elasticrash/tougo-query-builder
Last synced: 2 months ago
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query builder for postgres A little library for constructing raw sql queries.
- Host: GitHub
- URL: https://github.com/elasticrash/tougo-query-builder
- Owner: elasticrash
- Created: 2016-01-04T08:03:08.000Z (over 9 years ago)
- Default Branch: master
- Last Pushed: 2016-01-20T13:47:53.000Z (over 9 years ago)
- Last Synced: 2025-01-02T18:47:10.754Z (4 months ago)
- Language: JavaScript
- Size: 16.6 KB
- Stars: 1
- Watchers: 3
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG
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README
# tougo-query-builder
query builder for postgres
A little library for constructing raw sql queries.
@notice There are some function collections like spatial/string/alter that need different
initialization because we felt its better like that in order to be less confusing
(see example 4). Anyone is welcomed to do a pull request in github
@1.3.5 we added a dependency on the [pg package](https://www.npmjs.com/package/pg)
so as to be able, by using for example express, to write a simple rest end point directly
through this package. So don't forget to do a npm install to get the right packages.
### example
```javascript
var express = require('express');
var router = express.Router();
var path = require('path');
var connectionString = "postgres://postgres:password@localhost:5432/database";
var app = express();
var morgan = require('morgan');
var bodyParser = require('body-parser');
var methodOverride = require('method-override');
var qb =require('tougo-query-builder');
app.use(morgan('dev'));
app.use(bodyParser.urlencoded({'extended':'true'}));
app.use(bodyParser.json());
app.use(bodyParser.json({ type: 'application/vnd.api+json' }));
app.use(methodOverride());
app.listen(3000);
app.get('/api/property/list', function(req, res) {
var results = [];
var q = new qb;
var qstring = q.select('*').from('property').leftjoin('property','tenant', 'tenant_id');
q.connectionstring = connectionString;
results = q.connectandquery(res, qstring.query, results);
});
```
[LIST OF SUPPORTED FUNCTIONS](https://github.com/elasticrash/tougo-query-builder/wiki/Function-List)
# examples
### initialize
```javascript
var Constructor = require('tougo-query-builder');
var qb = new Constructor;
```
### example 1
SELECT * FROM PROPERTY
```javascript
var q = qb.select('*').from('property').query;
```
### example 2
SELECT * FROM PROPERTY LEFT JOIN TENANT ON PROPERTY.TENANT_ID = TENANT.TENANT_ID
```javascript
var q = qb.select('*').from('property').leftjoin('property','tenant', 'tenant_id').query;
```
### example 3
UPDATE TENANT SET at1 = 'val1', at2 = 'val2' WHERE tenant_id = 27
```javascript
var attributes = ["at1", "at2"];
var values = ["'val1'", "'val2'"];
var keyexpression = "tenant_id = 27";
var q = qb.update("tenant", attributes, values).where(keyexpression).query;
```
### example 4 (spatial)
SELECT ST_Transform(ST_GeomFromText('POINT(743238 2967416)',2249),4326)
```javascript
var qsp = new qb.spatial
var q1 = qsp.Transform("POINT(743238 2967416)", 2249, 4326).query;
var qb2 = new Constructor;
var q2 = qb2.select(q1).query;
```
# methods
```javascript
var Constructor = require('tougo-query-builder');
```
# install
```bash
npm install tougo-query-builder
```
# license
ISC